package com.yanxiuhair.framework.interceptor.impl;

import java.util.HashMap;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import org.springframework.stereotype.Component;
import com.yanxiuhair.common.json.JSON;
import com.yanxiuhair.framework.interceptor.RepeatSubmitInterceptor;

/**
 * @ClassName:  SameUrlDataInterceptor   
 * @Description: 判断请求url和数据是否和上一次相同， 如果和上次相同，则是重复提交表单。 有效时间为10秒内。 
 * @author: gaoxiaochuang   
 * @date:   2021年7月1日 下午4:38:12   
 *     
 * @Copyright: 2021 http://www.yanxiuhair.com/ Inc. All rights reserved. 
 * 注意：本内容仅限于许昌妍秀发制品有限公司内部传阅，禁止外泄以及用于其他的商业目
 */
@Component
public class SameUrlDataInterceptor extends RepeatSubmitInterceptor {
	public final String REPEAT_PARAMS = "repeatParams";

	public final String REPEAT_TIME = "repeatTime";

	public final String SESSION_REPEAT_KEY = "repeatData";

	/**
	 * 间隔时间，单位:秒 默认10秒
	 * 
	 * 两次相同参数的请求，如果间隔时间大于该参数，系统不会认定为重复提交的数据
	 */
	private int intervalTime = 10;

	public void setIntervalTime(int intervalTime) {
		this.intervalTime = intervalTime;
	}

	@SuppressWarnings("unchecked")
	@Override
	public boolean isRepeatSubmit(HttpServletRequest request) throws Exception {
		// 本次参数及系统时间
		String nowParams = JSON.marshal(request.getParameterMap());
		Map<String, Object> nowDataMap = new HashMap<String, Object>();
		nowDataMap.put(REPEAT_PARAMS, nowParams);
		nowDataMap.put(REPEAT_TIME, System.currentTimeMillis());

		// 请求地址（作为存放session的key值）
		String url = request.getRequestURI();

		HttpSession session = request.getSession();
		Object sessionObj = session.getAttribute(SESSION_REPEAT_KEY);
		if (sessionObj != null) {
			Map<String, Object> sessionMap = (Map<String, Object>) sessionObj;
			if (sessionMap.containsKey(url)) {
				Map<String, Object> preDataMap = (Map<String, Object>) sessionMap.get(url);
				if (compareParams(nowDataMap, preDataMap) && compareTime(nowDataMap, preDataMap)) {
					return true;
				}
			}
		}
		Map<String, Object> sessionMap = new HashMap<String, Object>();
		sessionMap.put(url, nowDataMap);
		session.setAttribute(SESSION_REPEAT_KEY, sessionMap);
		return false;
	}

	/**
	 * 判断参数是否相同
	 */
	private boolean compareParams(Map<String, Object> nowMap, Map<String, Object> preMap) {
		String nowParams = (String) nowMap.get(REPEAT_PARAMS);
		String preParams = (String) preMap.get(REPEAT_PARAMS);
		return nowParams.equals(preParams);
	}

	/**
	 * 判断两次间隔时间
	 */
	private boolean compareTime(Map<String, Object> nowMap, Map<String, Object> preMap) {
		long time1 = (Long) nowMap.get(REPEAT_TIME);
		long time2 = (Long) preMap.get(REPEAT_TIME);
		if ((time1 - time2) < (this.intervalTime * 1000)) {
			return true;
		}
		return false;
	}
}
